AnimationTimer not ticking in JavaFx 2.0
I am trying to use the AnimationTimer in JavaFX 2.0 as a game loop, but I can't get the timer running. It tick when I first open my game, and when I move the screen around to force a refresh. I runs correctly when I use a Timeline anywhere else in the game, but not without it. Can anyone help me? Is it something to do with the animation pulse not triggering? What do I need to do to keep the AnimationTimer running on it's own?